Sign In


Friction, wear and lubrication


VTT offers its customers profound knowledge on tribology (friction, wear and lubrication), top-level testing equipment, a computer modelling approach and international networking opportunities.

Controlled friction and wear provides improved equipment performance and savings in energy and materials. The lifetime of equipment can be extended while eliminating unexpected damage and downtime. VTT solves friction and wear problems with the help of comprehensive tribo-analysis, experimental research and computer modelling.

Experimental research

We carry out our experimental friction and wear research in the carefully controlled laboratory environment, with special emphasis on reliability and repeatability of measurements.  Our tribological experiments simulate the real application conditions as closely as possible.

We can carry out following types of experiments:

  • Model tests
  • Contact simulating tests
  • Component tests
  • Characterization


Learn more about our test equipment here.

Multi-scale modelling technology

With computer modelling of tribological conditions it is possible to create a more comprehensive and profound understanding on the requirements and conditions of the application. In combining the multi-scale modelling and experimental research it is possible to create a systematic method for generating optimised, break-through tribological solutions for industrial components and machinery.  

With its wide global network in the field of tribology research, VTT has been an active partner in national and international projects, including MOTRICOT, COSMOS , IC2, CARBONBON and IMAGO.

​More information coming

Tribocorrosion study of martensitic and austenitic stainless steels in 0.01M NaCl solution

Elina Huttunen-Saarivirta, Lauri Kilpi, Timo J. Hakala, Leena Carpen, Helena Ronkainen. 2016
Tribology International, Vol. 95, 358-371

Computational modelling based wear resistance analysis of thick composite coatings
Kenneth Holmberg, Anssi Laukkanen, Arash Ghabchi, M. Rombouts, Erja Turunen, Richard Waudby, Tomi Suhonen, K. Valtonen, E. Sarlin. 2014.
Tribology International, Vol. 72, pp. 13 - 30

Global energy consumption due to friction in trucks and buses
Kenneth Holmberg, Peter Andersson, Nils-Olof Nylund, Kari Mäkelä, A. Erdemir. 2014.
Tribology International, Vol. 78, pp. 94 - 114

Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures
J. Oksanen, Timo J. Hakala, S. Tervakangas, Petri Laakso, Lauri Kilpi, Helena Ronkainen, J. Koskinen. 2014.
Tribology International, Vol. 70, pp. 94 - 103

Wear resistance optimisation of composite coatings by computational microstructural modelling
Kenneth Holmberg, Anssi Laukkanen, Erja Turunen, Tarja Laitinen. 2014.
Surface and Coatings Technology, Vol. 247, No. May, pp. 1 - 13

Fibre Optic Sensors for Long-Term Monitoring of Oil Film Pressure in DieselEngine Main Bearing
Markku Kapulainen, Helena Ronkainen, Ari Hokkanen, Ingmar Stuns, Simo Varjus, Sami Nyyssönen, Raimo Turunen, Jari Halme. 2014
Tribology Letters, Vol. 56,  No: 1 , 47 - 54

Finite element analysis of coating adhesion failure in pre-existing crack field

Kenneth Holmberg, Anssi Laukkanen, Helena Ronkainen, Kim Wallin. 2013.
Tribology - Materials, Surfaces and Interfaces, Vol. 7, No. 1, pp. 42 - 51

Global energy consumption due to friction in paper machines
Kenneth Holmberg, Roope Siilasto, Tarja Laitinen, Peter Andersson, Ari Jäsberg. 2013.
Tribology International, Vol. 62, pp. 58 - 77

Low-speed sliding tests with nodular cast iron in contact with steel wire and a diamond tip
Richard Waudby, Peter Andersson, Kenneth Holmberg. 2013.
Tribology International, Vol. 65, pp. 171 - 176

Adhesion performance and tribological properties of atomic layer deposited aluminum oxide films
Helena Ronkainen, Lauri Kilpi, Antti Vaajoki, Simo Varjus, Oili Ylivaara, Riikka Puurunen.12th International Conference on Atomic Layer Deposition, ALD 2012, 17 - 20 June 2012, Dresden, Germany
Technical Program & Abstracts, published abstract of a poster. American Vacuum Society (AVS)

Static-to-sliding friction measurements
Peter Andersson, Lauri Kilpi, Kenneth Holmberg, Helena Ronkainen. 2012.
15th Nordic Symposium on Tribology, NORDTRIB2012, 12 - 15 June 2012, Trondheim, Norway. The Norwegian University of Science and Technology, SINTEF Materials and Chemistry (2012), 6 p.

Adhesion and tribological properties of hydrophobin proteins in aqueous lubrication on stainless steel surfaces

Timo J. Hakala, Päivi Laaksonen, V. Saikko, Tiina Ahlroos, Aino Helle, Riitta Mahlberg, H. Hähl, K. Jacobs, P. Kuosmanen, Markus B. Linder, Kenneth Holmberg. 2012.
RSC Advances, Vol. 2, No. 26, pp. 9867 - 9872

The effect of coating properties on the performance of a-C:H and ta-C films
Helena Ronkainen, Kenneth Holmberg, Anssi Laukkanen, Tom Andersson, M. Kano, T. Horiuchi, T. Suzuki. 2012
Tribologia, Vol. 31, No: 3 - 4, 3 - 10

Global energy consumption due to friction in passenger cars
Kenneth Holmberg, Peter Andersson, A. Erdemir. 2012.
Tribology International, Vol. 47, No. March, pp. 221-234

Coatings Tribology - Properties, Mechanisms, Techniques and Applications in Surface Engineering
Kenneth Holmberg, Allan Matthews. 2009.
Tribology and Interface Engineering Series: 56, Elsevier, 560 p. ISBN 978-0-444-52750-9

Tribological properties of hydrogenated and hydrogen-free diamond-likecarbon coatings
Helena Ronkainen. 2001
VTT Publications: 434
VTT Manufacturing Technology, Espoo, 2001. 52 p. + app. 91 p.

Tel.+358 20 722 7070
Opening hours Mon - Fri 9:00 - 11:00 and 12:00 - 15:00, UTC +3 time zone


P.O. Box 1000, FI-02044 VTT, Finland
Tel. exchange +358 20 722 111
Opening hours Mon - Fri 8:00 - 16:30,
UTC +3 time zone

Tel. +358 20 722 7070
Opening hours Mon - Fri 9:00 - 11:00 and 12:00 - 15:00,
UTC +3 time zone